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Abstract: Musculoskeletal disorder MSD is one of the major health problems inmechanical work especially in manual handling jobs. Muscle fatigue is believedto be the main reason for MSD. Posture analysis techniques have been used toexpose MSD risks of the work, but most of the conventional methods are onlysuitable for static posture analysis. Meanwhile the subjective influences fromthe inspectors can result differences in the risk assessment. Anotherdisadvantage is that the evaluation has to be taken place in the workshop, soit is impossible to avoid some design defects before data collection in thefield environment and it is time consuming. In order to enhance the efficiencyof ergonomic MSD risk evaluation and avoid subjective influences, we develop anew muscle fatigue model and a new fatigue index to evaluate the human musclefatigue during manual handling jobs in this paper. Our new fatigue model isclosely related to the muscle load during working procedure so that it can beused to evaluate the dynamic working process. This muscle fatigue model ismathematically validated and it is to be further experimental validated andintegrated into a virtual working environment to evaluate the muscle fatigueand predict the MSD risks quickly and objectively.

Autor: Liang Ma IRCCyN, Damien Chablat IRCCyN, Fouad Bennis IRCCyN, Wei Zhang DIE

Fuente: https://arxiv.org/

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